EP1553728B1 - Method for selecting wireless path in portable communication terminal, portable communication terminal and wireless communication system for use thereof - Google Patents

Method for selecting wireless path in portable communication terminal, portable communication terminal and wireless communication system for use thereof Download PDF

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Publication number
EP1553728B1
EP1553728B1 EP20050000059 EP05000059A EP1553728B1 EP 1553728 B1 EP1553728 B1 EP 1553728B1 EP 20050000059 EP20050000059 EP 20050000059 EP 05000059 A EP05000059 A EP 05000059A EP 1553728 B1 EP1553728 B1 EP 1553728B1
Authority
EP
European Patent Office
Prior art keywords
communication
communication terminal
wireless path
portable communication
server unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP20050000059
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1553728A1 (en
Inventor
Yasuhiro Himeno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of EP1553728A1 publication Critical patent/EP1553728A1/en
Application granted granted Critical
Publication of EP1553728B1 publication Critical patent/EP1553728B1/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
    • H04L12/1485—Tariff-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5691—Access to open networks; Ingress point selection, e.g. ISP selection
    • H04L12/5692—Selection among different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/04—Protocols specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/14—Multichannel or multilink protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing

Definitions

  • This invention relates to a technique for a portable communication terminal capable of utilizing a plurality of wireless paths with different billing systems to select a communication path.
  • JP-2000-134260 A and JP 2002-64869A disclose techniques for reducing the communication cost of such a service.
  • the volume of communication data to be transmitted between a client and a server exceeds a predetermined level in the system disclosed in JP-2000-134260 A the data to be transmitted is divided and sent out by way of a communication network with a measured rate billing system and a communication network with a connection time billing system.
  • a portable wireless terminal of JP-2002-64869 A uses a non-public wireless line for downloading contents and a public mobile communication system for settlement of accounts.
  • JP-2000-134260 A if the contents are partly transmitted by way of a communication network with a connection time billing system, it will be difficult to reduce the communication cost because the transmission time becomes longer as the communication data increases.
  • the system of JP-2002-64869 A is accompanied by a problem that the mobility of the user who is trying to download contents is limited because all the contents have to be acquired from a given server by way of a non-public wireless line and hence the user has to remain in the area where the line can be captured..
  • US-A-2003/142653 and EP-A-1326 379 disclose the use of a server for transmission of segmented data files and for parallel transmission of data files, respectively.
  • a portable communication terminal it is possible for a portable communication terminal to use a line of flat rate billing system with priority in order to suppress the communication cost. Additionally, even if the portable communication terminal is in an area where a line of flat rate billing system is not available, the user can try to use a line of measured rate billing system. As a result, it is possible to use a portable communication terminal in various place.
  • FIG. 1 is a schematic block diagram of an embodiment of wireless communication system according to the invention, illustrating the configuration thereof.
  • the system 100 of the embodiment comprises a portable communication terminal 10, which may typically be a portable telephone set or a personal information terminal for schedule management and some other purposes, and a server unit 20 possessed by the telecommunication service provider for the portable communication terminal 10 that is connected to an Internet 100a.
  • the telecommunication service provider possessing the server unit 20 provides a service of delivering contents such as music, pictures or the like to the user's portable communication terminal 10 by means of wireless communications using a short distance wireless communication system like a wireless LAN or a packet communication system for portable telephone sets.
  • the telecommunication service provider applies a flat rate billing system, which charges a fixed amount for a predetermined period regardless of the time spent for communications and the volume of received data, to a short distance wireless communication system.
  • the telecommunication service provider applies a measured rate billing system, which charges an amount determined as a function of the acquired data, to a packet communication system.
  • the portable communication terminal 10 includes a short distance wireless communication section 11 having a short distance wireless communication feature, a mobile communication section 12 having a wireless communication feature like that of a portable telephone set and a wireless control section 13 for selectively driving the short distance wireless communication section 11 or the mobile communication section 12 in the portable communication terminal 10.
  • a wireless LAN standard such as IEEE802.11b or IEEE802.11g or Bluetooth® that is a known short distance wireless communication standard may be applied to the short distance wireless communication section 11.
  • the server unit 20 includes a short distance wireless antenna 21 for communicating with the short distance wireless communication section 11 and the mobile communication section 12 of the portable communication terminal 10 and a mobile base station 22. It acquires a data file on the Internet 100a in response to a request from the portable communication terminal 10 and supplies the data file to the portable communication terminal 10.
  • the short distance wireless antenna 21 is arranged at a public place such as a railway station or a shopping center.
  • the server unit 20 provides short distance wireless communication services in the communication area of the short distance wireless antenna 21 to the registered user who has paid a registration fee of a predetermined amount.
  • the user of the system 100 of this embodiment applies for registration in advance for the use of the wireless paths of the telecommunication service provider possessing the server unit 20 by means of a registration form image as illustrated in FIG. 2.
  • the illustrated registration image shows an example which is registered for using "line A" of a flat rate billing system and "line B" of a measured rate billing system.
  • the part for the "line B" of the registration form image of FIG. 2 includes "acquisition conditions" for specifying the upper limit of data volume that the user can acquire from the server unit 20 and that of communication charge for data acquisition on a monthly basis, a "download categories” item for specifying the category of the file that the user downloads from the server unit 20 and a "size” item for specifying the upper limit of file size that can be downloaded.
  • the communication charge is suppressed from infinitely increasing by providing restrictions for communications by way of the line of measured rate billing system.
  • the maximum volume of data that can be acquired per month is defined to be “20480KB” at the cost of " ⁇ 2,000” as computed according to the measured rate billing system of the telecommunication service provider as “acquisition conditions”.
  • “download categories” item it is defined that the user can acquire files of the data formats of "text (txt, html”, etc.)” and “image (jpg, gif, png, etc)” but cannot acquire files of the data formats of "music (wav, mp3, mid, etc)” and “picture (mov, avi, 3gp, etc.)".
  • the portable communication terminal 10 and the server unit 20 can exchange a data file of contents that are to be downloaded by dividing the data file.
  • a byte range request of RFC2616 as defined by the IETF (Internet Engineering Task Force) may be utilized if HTTP is used as communication protocol. It is possible to divide the file to be downloaded into packets of a predetermined volume of data to acquire the file by defining the byte range. Even if the HTTP communication is interrupted, it is not necessary to receive the file from the beginning when the communication is resumed. In other words, it is possible to begin to receive the file from the remaining part when the communication is resumed.
  • the sequence of operation of the system 100 of the embodiment will be described by referring to the flow chart of FIG. 3.
  • the user of the portable communication terminal 10 requests the server unit 20 to download the file of certain contents by operating the terminal 10.
  • the server unit 20 notifies the portable communication terminal 10 of the size of the file (Step S1).
  • the wireless control section 13 of the portable communication terminal 10 detects a candidate for wireless path available at the current location of the terminal 10 and determines if the candidates include at a line of flat rate billing system or not. If, it is determined that there is a line of flat rate billing system as a result (Step S2: Yes), the wireless control section 13 orders the short distance wireless communication section 11 to download the data file. If the data file cannot be divided and downloaded from the server unit 20 to the portable communication terminal 10 (Step S3: No), the short distance communication section 11 receives the data file supplied from the server unit 20 by way of the short distance wireless antenna 21 collectively at a time (Step S4).
  • the short distance wireless communication section 11 requests the server unit 20 to divide and download the data file, and sequentially receives the divided file from the server unit 20 that received the request. In this stage of operation, the short distance wireless communication section 11 checks if the current location is found in the communication area of the flat rate billing system or not each time the communication section 11 receives a succeeding part of the divided file (Step S6: Yes). The processing operation ends when all the divided file is received (Step S6: No).
  • Step S2 determines that no line of flat rate billing system is available at the current location at the time of starting the downloading operation or during the operation of dividing and downloading the file (Step S2: No) but a line of measured rate billing system is available (Step S7: Yes)
  • the section 13 determines if it can proceed with the current downloading operation by referring to the respective conditions for the measured rate billing system described above by referring to FIG. 2.
  • Step S8 Yes
  • Step S9 Yes
  • the section 13 drives the mobile communication section 12, which is responsible for utilizing a line of measured rate billing system, to carry out an operation of dividing and downloading the file from the server unit 20 in a manner as described above (Steps S5 and S6).
  • Step S9 determines if it can download the file collectively by referring to the definition of the "size" item in FIG. 2 and, if the section 13 determines that it can download the file collectively (Step S10: Yes), the wireless control section 13 drives the mobile communication section 12 to collectively download the data file (Step S4).
  • Step S7 No
  • Step S8 No
  • Step S 10 No
  • the terminal 10 stands by until the radio wave situation changes as the user moves to change its location (Step S11) and, once it gets into an area where a line of flat rate billing system is available (Step S2: Yes), it starts downloading the file.
  • the wireless control section 13 of the portable communication terminal 10 dynamically switches the wireless path depending on the radio wave situation of the current location.
  • the wireless control section 13 orders the mobile communication section 12 to download the file and, when (b) a line of flat rate billing system becomes available during the mobile communication section 12 is operating to download the file because of a change in the radio wave situation, the wireless control section 13 switches from the mobile communication section 12 to the short distance wireless communication section 11 to download the remaining part of the divided file.
  • the wireless control section 13 switches from the line of flat rate billing system to a line of measured rate billing system to download the remaining part of the divided file. Subsequently, when (d) a line of flat rate billing system is captured, the wireless control section 13 drives the short distance wireless communication section 11 to continue the operation of downloading the remaining part of the divided file regardless if (e) the line of measured rate billing system is still available or not. If (f) no wireless path is available at all, the wireless control section 13 suspends the downloading operation until the radio wave situation changes.
  • the wireless control section 13 when the portable communication terminal 10 of the system 100 of the embodiment acquires a data file of contents from the server unit 20, the wireless control section 13 operates so as to use a line of flat rate billing system with priority to consequently suppress the communication cost of the downloading operation. It is known that short distance wireless communication services such as wireless LANs provide only a small communication area. However, according to the present invention, if the portable communication terminal 10 moves out of a communication area while the short distance wireless communication section 11 is downloading a divided data file, the wireless control section 13 automatically switches from the short distance wireless communication section 11 to the mobile communication section 12 so that the user can quickly acquire the contents he or she wants.
  • While a plurality of wireless paths that the portable communication terminal 10 can use are provided by a single telecommunication service provider having a server unit 20 in the description of the first embodiment given above by referring to FIG. 1, the user may alternatively concludes separate agreements with telecommunication service providers A and B for a line of flat rate billing system and a line of measured rate billing system as shown in FIG. 6.
  • the short distance wireless communication section 11 of the portable communication terminal 10 communicates with a server unit 20a having a short distance wireless antenna 21, while the mobile communication section 12 communicates with a server unit 20b having a mobile base station 22.
  • a system having a configuration as shown FIG. 6 is advantageous for an application where a data file is downloaded collectively or a plurality of data files are downloaded in parallel.
  • a line of measured rate billing system that is used for ordinary telephone communications and a line of flat rate billing system that is used for so-called IP telephone communications, using VoIP (Voice over Internet Protocol), can be selectively used for exchanging audio call signals for telephone communications.
  • VoIP Voice over Internet Protocol
  • the portable telephone set has a video phone feature, it is possible to selectively use a line of measured rate billing system conforming to a moving image communication standard such as 3G-324M and a line of flat rate billing system using a protocol for video phone communications such as H.323 or SIP (Session Initiation Protocol).
  • a line of flat rate billing system is selected with priority. It may be so arranged that, when the communication data volume exceeds the volume limit defined for the flat rate billing system, the excessive data is transmitted by a line of measured rate billing system. Additionally, when a plurality of lines of measured rate billing system are provided, it is desirable to select a line of measured rate billing system that can transmit data at the lowest cost with priority when a line of flat rate billing system is switched to a line of measured rate billing system.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Meter Arrangements (AREA)
  • Telephone Function (AREA)
  • Telephonic Communication Services (AREA)
EP20050000059 2004-01-07 2005-01-04 Method for selecting wireless path in portable communication terminal, portable communication terminal and wireless communication system for use thereof Ceased EP1553728B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004002177A JP4269162B2 (ja) 2004-01-07 2004-01-07 携帯通信端末の無線経路選択方法およびその携帯通信端末並びに無線通信システム
JP2004002177 2004-01-07

Publications (2)

Publication Number Publication Date
EP1553728A1 EP1553728A1 (en) 2005-07-13
EP1553728B1 true EP1553728B1 (en) 2006-09-06

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EP20050000059 Ceased EP1553728B1 (en) 2004-01-07 2005-01-04 Method for selecting wireless path in portable communication terminal, portable communication terminal and wireless communication system for use thereof

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US (1) US7233784B2 (ja)
EP (1) EP1553728B1 (ja)
JP (1) JP4269162B2 (ja)
CN (1) CN1638337A (ja)
DE (1) DE602005000103T2 (ja)

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Publication number Priority date Publication date Assignee Title
CN101951560A (zh) * 2010-09-16 2011-01-19 中兴通讯股份有限公司 一种在集群通话中控制话权状态的方法及系统
CN101951560B (zh) * 2010-09-16 2015-06-10 中兴通讯股份有限公司 一种在集群通话中控制话权状态的方法及系统

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US7233784B2 (en) 2007-06-19
DE602005000103T2 (de) 2006-12-28
US20050148319A1 (en) 2005-07-07
EP1553728A1 (en) 2005-07-13
JP4269162B2 (ja) 2009-05-27
DE602005000103D1 (de) 2006-10-19
JP2005198021A (ja) 2005-07-21
CN1638337A (zh) 2005-07-13

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